*{
    margin: 0;
    padding: 0;
}
body{
    margin: 0;
    padding: 0;
    background-image: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    position: relative;
}
.tab{
    width: 15%;
    background-image: linear-gradient(to right, #434343 0%, black 100%);
    height: 100%;
    position: fixed;
    overflow: scroll;

}
.tab dl{
    font-size: 18px;
    cursor: pointer;
}
.tab dl dt{
    height: 35px;
    background-color:#fdcb6e;
    line-height: 35px;
    font-weight: bold;
    font-size: 19px;
    border-bottom: 1px solid #636e72;
}
.tab dl dt:hover{
    background-color:#eba117;
}
.tab dl dd{
    height: 30px;
    line-height: 30px;
    text-indent: 10px;
    border-bottom: 1px solid #2d3436;
    color: #ffffff;
}
.tab dl dd:hover{
    background-color: #000000;
    color: #ffeaa7;
}
.current_info{
    width: 83.5%;
    height: 5%;
    position: fixed;
    left: 16%;
    top: 0px;
    border-bottom: 1px solid #cccccc;
}
.current_info .one_class{
    font-size: 17px;
    color: #e17055;
    cursor: pointer;
}
.current_info .two_class{
    font-size: 17px;
    color: #e84393;
    cursor: pointer;
}
.current_info .one_class:hover{
    color: #fdcb6e;
}
.current_info .two_class:hover{
    color: #fdcb6e;
}
.current_info .bj{
    font-size: 17px;
}
#main{
    position: fixed;
    width: 83.5%;
    left: 16%;
    top: 50px;
    height: 100%;
    overflow: scroll;
}
#main ul{
    list-style: none;
}
#main ul li{
    width: 15%;
    float: left;
    margin-left: 1%;
    border: 1px solid #130f40;
    margin-top: 10px;
    /* background-color: #95afc0; */
    cursor: pointer;
    opacity: 0.8;
}
#main ul li:hover{
    opacity: 1;
}
#main ul li img{
    width:100%;
    height: 82px;
    border: 1px solid #535c68;
}
#main ul li a{
    display: block;
    text-decoration: none;
    color: #ffffff;
    text-align: center;
    height: 24px;
    line-height: 24px;
    background-color: #535c68;
    font-weight: bold;
}
#main ul li a:hover{
    color: #eb4d4b;
}

#alertMessage{
    position: absolute;
    width: 10%;
    height: 50px;
    border: 1px solid #ccc;
    left: 48%;
    top:250px;
    font-size: 20px;
    background-color: #95afc0;
    text-align: center;
    line-height: 50px;
    border-radius: 50px;
    color: #ffffff;
    font-weight: bold;
}